Oomis I agree with you and it is frustrating when everyone hides behind halacha to make things the way they want it to be. There are even different shitas from what I have heard about using your own hair to make a sheitel. I was extremely surprised about this because I was taught that you could not grow your own hair as a girl and cut it to make your own wig. Which made sense to me. What would be the point, wouldn’t you then be showing your own hair? Years ago, in the country there was this vabel from Lakewood that told me she was making a sheitel from her own hair and her Rav told her she could. I was very surprised, but if she asked her Rav and he told her she could who was I to question that.
I am also quite sure that every Rosh Yeshiva would have a very frank talk with all their talmidim if this were a halacha, And there would be no need at all for this discussion if in fact it was a halacha because the issue would be moot.